| Cooperative mode | The process of obtaining source photo images of faces from videostream when a person interacts with a camera. | 
| Face parameters | Emotions, mouth attributes, head pose, etc. | 
| Body parameters | Backpack, headwear, clothing color, etc. | 
| Image parameters | Width and height, aspect ratio, size, etc. | 
| Basic attributes | Age, gender, and ethnicity. | 
| Samples, Warps, Normalized images | Images containing a face and corresponding to certain standards. | 
| Face | Faces are changeable objects that include information about a single face. | 
| Descriptor | A descriptor is a set of unique features received from the sample. A descriptor requires much less storage memory in comparison with the sample and is used for comparison of faces. | 
| Matching | The operation of matching descriptors stored in the database. | 
| Non-cooperative mode | The process of obtaining the source photo images of faces from videostream, while a person may not interact with the camera. | 
| Occlusion | State of an object (eye, mouth) when it is hidden by any other object. | 
| Landmarks | Characteristic points on a face corresponding to the position of a certain object of a face. They are determined by the LUNA PLATFORM. | 
| Message Queue | A Message Queue is a service that receives messages and stores them in the appropriate queue until another service receives them. | 
| Routing key | Routing key is the name for the queue in the message queue service. | 
| Bucket | A logical entity used to store objects. |